18226499 has 4 divisors (see below), whose sum is σ = 19298664. Its totient is φ = 17154336.

The previous prime is 18226493. The next prime is 18226501. The reversal of 18226499 is 99462281.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18226499 - 2¹⁶ = 18160963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18226493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 536057 + ... + 536090.

It is an arithmetic number, because the mean of its divisors is an integer number (4824666).

Almost surely, 2^18226499 is an apocalyptic number.

18226499 is a deficient number, since it is larger than the sum of its proper divisors (1072165).

18226499 is a wasteful number, since it uses less digits than its factorization.

18226499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072164.

The product of its digits is 62208, while the sum is 41.

The square root of 18226499 is about 4269.2504025883. The cubic root of 18226499 is about 263.1688112250.

The spelling of 18226499 in words is "eighteen million, two hundred twenty-six thousand, four hundred ninety-nine".